includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4 /**
   5  * @package MediaWiki
   6  */
   7
   8 /**
   9  * @todo document
  10  * @package MediaWiki
  11  */
  12 class OutputPage {
  13         var $mMetatags, $mKeywords;
  14         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  15         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  16         var $mSubtitle, $mRedirect, $mStatusCode;
  17         var $mLastModified, $mETag, $mCategoryLinks;
  18         var $mScripts, $mLinkColours, $mPageLinkTitle;
  19
  20         var $mSuppressQuickbar;
  21         var $mOnloadHandler;
  22         var $mDoNothing;
  23         var $mContainsOldMagic, $mContainsNewMagic;
  24         var $mIsArticleRelated;
  25         protected $mParserOptions; // lazy initialised, use parserOptions()
  26         var $mShowFeedLinks = false;
  27         var $mEnableClientCache = true;
  28         var $mArticleBodyOnly = false;
  29
  30         var $mNewSectionLink = false;
  31         var $mNoGallery = false;
  32
  33         /**
  34          * Constructor
  35          * Initialise private variables
  36          */
  37         function OutputPage() {
  38                 $this->mMetatags = $this->mKeywords = $this->mLinktags = array();
  39                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  40                 $this->mRedirect = $this->mLastModified =
  41                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  42                 $this->mOnloadHandler = $this->mPageLinkTitle = '';
  43                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  44                 $this->mSuppressQuickbar = $this->mPrintable = false;
  45                 $this->mLanguageLinks = array();
  46                 $this->mCategoryLinks = array();
  47                 $this->mDoNothing = false;
  48                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  49                 $this->mParserOptions = null;
  50                 $this->mSquidMaxage = 0;
  51                 $this->mScripts = '';
  52                 $this->mETag = false;
  53                 $this->mRevisionId = null;
  54                 $this->mNewSectionLink = false;
  55         }
  56
  57         public function redirect( $url, $responsecode = '302' ) {
  58                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  59                 $this->mRedirect = str_replace( "\n", '', $url );
  60                 $this->mRedirectCode = $responsecode;
  61         }
  62
  63         /**
  64          * Set the HTTP status code to send with the output.
  65          *
  66          * @param int $statusCode
  67          * @return nothing
  68          */
  69         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  70
  71         # To add an http-equiv meta tag, precede the name with "http:"
  72         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  73         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  74         function addScript( $script ) { $this->mScripts .= $script; }
  75
  76         /**
  77          * Add a self-contained script tag with the given contents
  78          * @param string $script JavaScript text, no <script> tags
  79          */
  80         function addInlineScript( $script ) {
  81                 global $wgJsMimeType;
  82                 $this->mScripts .= "<script type=\"$wgJsMimeType\"><!--\n$script\n--></script>";
  83         }
  84
  85         function getScript() { return $this->mScripts; }
  86
  87         function setETag($tag) { $this->mETag = $tag; }
  88         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
  89         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
  90
  91         function addLink( $linkarr ) {
  92                 # $linkarr should be an associative array of attributes. We'll escape on output.
  93                 array_push( $this->mLinktags, $linkarr );
  94         }
  95
  96         function addMetadataLink( $linkarr ) {
  97                 # note: buggy CC software only reads first "meta" link
  98                 static $haveMeta = false;
  99                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 100                 $this->addLink( $linkarr );
 101                 $haveMeta = true;
 102         }
 103
 104         /**
 105          * checkLastModified tells the client to use the client-cached page if
 106          * possible. If sucessful, the OutputPage is disabled so that
 107          * any future call to OutputPage->output() have no effect.
 108          *
 109          * @return bool True iff cache-ok headers was sent.
 110          */
 111         function checkLastModified ( $timestamp ) {
 112                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 113                 $fname = 'OutputPage::checkLastModified';
 114
 115                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 116                         wfDebug( "$fname: CACHE DISABLED, NO TIMESTAMP\n" );
 117                         return;
 118                 }
 119                 if( !$wgCachePages ) {
 120                         wfDebug( "$fname: CACHE DISABLED\n", false );
 121                         return;
 122                 }
 123                 if( $wgUser->getOption( 'nocache' ) ) {
 124                         wfDebug( "$fname: USER DISABLED CACHE\n", false );
 125                         return;
 126                 }
 127
 128                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 129                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 130
 131                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 132                         # IE sends sizes after the date like this:
 133                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 134                         # this breaks strtotime().
 135                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 136                         $modsinceTime = strtotime( $modsince );
 137                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 138                         wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
 139                         wfDebug( "$fname: --  we might send Last-Modified : $lastmod\n", false );
 140                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 141                                 # Make sure you're in a place you can leave when you call us!
 142                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 143                                 $this->mLastModified = $lastmod;
 144                                 $this->sendCacheControl();
 145                                 wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 146                                 $this->disable();
 147
 148                                 // Don't output a compressed blob when using ob_gzhandler;
 149                                 // it's technically against HTTP spec and seems to confuse
 150                                 // Firefox when the response gets split over two packets.
 151                                 wfClearOutputBuffers();
 152
 153                                 return true;
 154                         } else {
 155                                 wfDebug( "$fname: READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 156                                 $this->mLastModified = $lastmod;
 157                         }
 158                 } else {
 159                         wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
 160                         $this->mLastModified = $lastmod;
 161                 }
 162         }
 163
 164         function getPageTitleActionText () {
 165                 global $action;
 166                 switch($action) {
 167                         case 'edit':
 168                         case 'delete':
 169                         case 'protect':
 170                         case 'unprotect':
 171                         case 'watch':
 172                         case 'unwatch':
 173                                 // Display title is already customized
 174                                 return '';
 175                         case 'history':
 176                                 return wfMsg('history_short');
 177                         case 'submit':
 178                                 // FIXME: bug 2735; not correct for special pages etc
 179                                 return wfMsg('preview');
 180                         case 'info':
 181                                 return wfMsg('info_short');
 182                         default:
 183                                 return '';
 184                 }
 185         }
 186
 187         public function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 188         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 189         public function setPageTitle( $name ) {
 190                 global $action, $wgContLang;
 191                 $name = $wgContLang->convert($name, true);
 192                 $this->mPagetitle = $name;
 193                 if(!empty($action)) {
 194                         $taction =  $this->getPageTitleActionText();
 195                         if( !empty( $taction ) ) {
 196                                 $name .= ' - '.$taction;
 197                         }
 198                 }
 199
 200                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 201         }
 202         public function getHTMLTitle() { return $this->mHTMLtitle; }
 203         public function getPageTitle() { return $this->mPagetitle; }
 204         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 205         public function getSubtitle() { return $this->mSubtitle; }
 206         public function isArticle() { return $this->mIsarticle; }
 207         public function setPrintable() { $this->mPrintable = true; }
 208         public function isPrintable() { return $this->mPrintable; }
 209         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 210         public function isSyndicated() { return $this->mShowFeedLinks; }
 211         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 212         public function getOnloadHandler() { return $this->mOnloadHandler; }
 213         public function disable() { $this->mDoNothing = true; }
 214
 215         public function setArticleRelated( $v ) {
 216                 $this->mIsArticleRelated = $v;
 217                 if ( !$v ) {
 218                         $this->mIsarticle = false;
 219                 }
 220         }
 221         public function setArticleFlag( $v ) {
 222                 $this->mIsarticle = $v;
 223                 if ( $v ) {
 224                         $this->mIsArticleRelated = $v;
 225                 }
 226         }
 227
 228         public function isArticleRelated() { return $this->mIsArticleRelated; }
 229
 230         public function getLanguageLinks() { return $this->mLanguageLinks; }
 231         public function addLanguageLinks($newLinkArray) {
 232                 $this->mLanguageLinks += $newLinkArray;
 233         }
 234         public function setLanguageLinks($newLinkArray) {
 235                 $this->mLanguageLinks = $newLinkArray;
 236         }
 237
 238         public function getCategoryLinks() {
 239                 return $this->mCategoryLinks;
 240         }
 241
 242         /**
 243          * Add an array of categories, with names in the keys
 244          */
 245         public function addCategoryLinks($categories) {
 246                 global $wgUser, $wgContLang;
 247
 248                 if ( !is_array( $categories ) ) {
 249                         return;
 250                 }
 251                 # Add the links to the link cache in a batch
 252                 $arr = array( NS_CATEGORY => $categories );
 253                 $lb = new LinkBatch;
 254                 $lb->setArray( $arr );
 255                 $lb->execute();
 256
 257                 $sk =& $wgUser->getSkin();
 258                 foreach ( $categories as $category => $unused ) {
 259                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 260                         $text = $wgContLang->convertHtml( $title->getText() );
 261                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 262                 }
 263         }
 264
 265         public function setCategoryLinks($categories) {
 266                 $this->mCategoryLinks = array();
 267                 $this->addCategoryLinks($categories);
 268         }
 269
 270         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 271         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 272
 273         public function addHTML( $text ) { $this->mBodytext .= $text; }
 274         public function clearHTML() { $this->mBodytext = ''; }
 275         public function getHTML() { return $this->mBodytext; }
 276         public function debug( $text ) { $this->mDebugtext .= $text; }
 277
 278         /* @deprecated */
 279         public function setParserOptions( $options ) {
 280                 return $this->parserOptions( $options );
 281         }
 282
 283         public function parserOptions( $options = null ) {
 284                 if ( !$this->mParserOptions ) {
 285                         $this->mParserOptions = new ParserOptions;
 286                 }
 287                 return wfSetVar( $this->mParserOptions, $options );
 288         }
 289
 290         /**
 291          * Set the revision ID which will be seen by the wiki text parser
 292          * for things such as embedded {{REVISIONID}} variable use.
 293          * @param mixed $revid an integer, or NULL
 294          * @return mixed previous value
 295          */
 296         public function setRevisionId( $revid ) {
 297                 $val = is_null( $revid ) ? null : intval( $revid );
 298                 return wfSetVar( $this->mRevisionId, $val );
 299         }
 300
 301         /**
 302          * Convert wikitext to HTML and add it to the buffer
 303          * Default assumes that the current page title will
 304          * be used.
 305          *
 306          * @param string $text
 307          * @param bool   $linestart
 308          */
 309         public function addWikiText( $text, $linestart = true ) {
 310                 global $wgTitle;
 311                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 312         }
 313
 314         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 315                 $this->addWikiTextTitle($text, $title, $linestart);
 316         }
 317
 318         private function addWikiTextTitle($text, &$title, $linestart) {
 319                 global $wgParser;
 320                 $fname = 'OutputPage:addWikiTextTitle';
 321                 wfProfileIn($fname);
 322                 wfIncrStats('pcache_not_possible');
 323                 $parserOutput = $wgParser->parse( $text, $title, $this->parserOptions(),
 324                         $linestart, true, $this->mRevisionId );
 325                 $this->addParserOutput( $parserOutput );
 326                 wfProfileOut($fname);
 327         }
 328
 329         /**
 330          * @todo document
 331          * @param ParserOutput object &$parserOutput
 332          */
 333         public function addParserOutputNoText( &$parserOutput ) {
 334                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 335                 $this->addCategoryLinks( $parserOutput->getCategories() );
 336                 $this->mNewSectionLink = $parserOutput->getNewSection();
 337                 $this->addKeywords( $parserOutput );
 338                 if ( $parserOutput->getCacheTime() == -1 ) {
 339                         $this->enableClientCache( false );
 340                 }
 341                 if ( $parserOutput->mHTMLtitle != "" ) {
 342                         $this->mPagetitle = $parserOutput->mHTMLtitle ;
 343                 }
 344                 if ( $parserOutput->mSubtitle != '' ) {
 345                         $this->mSubtitle .= $parserOutput->mSubtitle ;
 346                 }
 347                 $this->mNoGallery = $parserOutput->getNoGallery();
 348                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 349         }
 350
 351         /**
 352          * @todo document
 353          * @param ParserOutput &$parserOutput
 354          */
 355         function addParserOutput( &$parserOutput ) {
 356                 $this->addParserOutputNoText( $parserOutput );
 357                 $text = $parserOutput->getText();
 358                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 359                 $this->addHTML( $text );
 360         }
 361
 362         /**
 363          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 364          * Saves the text into the parser cache if possible.
 365          *
 366          * @param string  $text
 367          * @param Article $article
 368          * @param bool    $cache
 369          */
 370         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 371                 global $wgParser, $wgUser;
 372
 373                 $popts = $this->parserOptions();
 374                 $popts->setTidy(true);
 375                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 376                         $popts, true, true, $this->mRevisionId );
 377                 $popts->setTidy(false);
 378                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 379                         $parserCache =& ParserCache::singleton();
 380                         $parserCache->save( $parserOutput, $article, $wgUser );
 381                 }
 382
 383                 $this->addParserOutput( $parserOutput );
 384         }
 385
 386         /**
 387          * For anything that isn't primary text or interface message
 388          *
 389          * @param string $text
 390          * @param bool   $linestart Is this the start of a line?
 391          */
 392         public function addSecondaryWikiText( $text, $linestart = true ) {
 393                 global $wgTitle;
 394                 $popts = $this->parserOptions();
 395                 $popts->setTidy(true);
 396                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 397                 $popts->setTidy(false);
 398         }
 399
 400
 401         /**
 402          * Add the output of a QuickTemplate to the output buffer
 403          *
 404          * @param QuickTemplate $template
 405          */
 406         public function addTemplate( &$template ) {
 407                 ob_start();
 408                 $template->execute();
 409                 $this->addHTML( ob_get_contents() );
 410                 ob_end_clean();
 411         }
 412
 413         /**
 414          * Parse wikitext and return the HTML.
 415          *
 416          * @param string $text
 417          * @param bool   $linestart Is this the start of a line?
 418          * @param bool   $interface ??
 419          */
 420         public function parse( $text, $linestart = true, $interface = false ) {
 421                 global $wgParser, $wgTitle;
 422                 $popts = $this->parserOptions();
 423                 if ( $interface) { $popts->setInterfaceMessage(true); }
 424                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 425                         $linestart, true, $this->mRevisionId );
 426                 if ( $interface) { $popts->setInterfaceMessage(false); }
 427                 return $parserOutput->getText();
 428         }
 429
 430         /**
 431          * @param Article $article
 432          * @param User    $user
 433          *
 434          * @return bool True if successful, else false.
 435          */
 436         public function tryParserCache( &$article, $user ) {
 437                 $parserCache =& ParserCache::singleton();
 438                 $parserOutput = $parserCache->get( $article, $user );
 439                 if ( $parserOutput !== false ) {
 440                         $this->addParserOutput( $parserOutput );
 441                         return true;
 442                 } else {
 443                         return false;
 444                 }
 445         }
 446
 447         /**
 448          * @param int $maxage Maximum cache time on the Squid, in seconds.
 449          */
 450         public function setSquidMaxage( $maxage ) {
 451                 $this->mSquidMaxage = $maxage;
 452         }
 453
 454         /**
 455          * Use enableClientCache(false) to force it to send nocache headers
 456          * @param $state ??
 457          */
 458         public function enableClientCache( $state ) {
 459                 return wfSetVar( $this->mEnableClientCache, $state );
 460         }
 461
 462         function uncacheableBecauseRequestvars() {
 463                 global $wgRequest;
 464                 return  $wgRequest->getText('useskin', false) === false
 465                         && $wgRequest->getText('uselang', false) === false;
 466         }
 467
 468         public function sendCacheControl() {
 469                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 470                 $fname = 'OutputPage::sendCacheControl';
 471
 472                 if ($wgUseETag && $this->mETag)
 473                         $wgRequest->response()->header("ETag: $this->mETag");
 474
 475                 # don't serve compressed data to clients who can't handle it
 476                 # maintain different caches for logged-in users and non-logged in ones
 477                 $wgRequest->response()->header( 'Vary: Accept-Encoding, Cookie' );
 478                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 479                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 480                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 481                         {
 482                                 if ( $wgUseESI ) {
 483                                         # We'll purge the proxy cache explicitly, but require end user agents
 484                                         # to revalidate against the proxy on each visit.
 485                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 486                                         wfDebug( "$fname: proxy caching with ESI; {$this->mLastModified} **\n", false );
 487                                         # start with a shorter timeout for initial testing
 488                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 489                                         $wgRequest->response()->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 490                                         $wgRequest->response()->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 491                                 } else {
 492                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 493                                         # to revalidate against the proxy on each visit.
 494                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 495                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 496                                         wfDebug( "$fname: local proxy caching; {$this->mLastModified} **\n", false );
 497                                         # start with a shorter timeout for initial testing
 498                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 499                                         $wgRequest->response()->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 500                                 }
 501                         } else {
 502                                 # We do want clients to cache if they can, but they *must* check for updates
 503                                 # on revisiting the page.
 504                                 wfDebug( "$fname: private caching; {$this->mLastModified} **\n", false );
 505                                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 506                                 $wgRequest->response()->header( "Cache-Control: private, must-revalidate, max-age=0" );
 507                         }
 508                         if($this->mLastModified) $wgRequest->response()->header( "Last-modified: {$this->mLastModified}" );
 509                 } else {
 510                         wfDebug( "$fname: no caching **\n", false );
 511
 512                         # In general, the absence of a last modified header should be enough to prevent
 513                         # the client from using its cache. We send a few other things just to make sure.
 514                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 515                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 516                         $wgRequest->response()->header( 'Pragma: no-cache' );
 517                 }
 518         }
 519
 520         /**
 521          * Finally, all the text has been munged and accumulated into
 522          * the object, let's actually output it:
 523          */
 524         public function output() {
 525                 global $wgUser, $wgOutputEncoding, $wgRequest;
 526                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 527                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgAjaxSearch, $wgServer;
 528                 global $wgStyleVersion;
 529
 530                 if( $this->mDoNothing ){
 531                         return;
 532                 }
 533                 $fname = 'OutputPage::output';
 534                 wfProfileIn( $fname );
 535                 $sk = $wgUser->getSkin();
 536
 537                 if ( $wgUseAjax ) {
 538                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js?$wgStyleVersion\"></script>\n" );
 539                 }
 540
 541                 if ( $wgUseAjax && $wgAjaxSearch ) {
 542                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxsearch.js?$wgStyleVersion\"></script>\n" );
 543                         $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 544                 }
 545
 546                 if ( '' != $this->mRedirect ) {
 547                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 548                                 # Standards require redirect URLs to be absolute
 549                                 global $wgServer;
 550                                 $this->mRedirect = $wgServer . $this->mRedirect;
 551                         }
 552                         if( $this->mRedirectCode == '301') {
 553                                 if( !$wgDebugRedirects ) {
 554                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 555                                 }
 556                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 557                         }
 558
 559                         $this->sendCacheControl();
 560
 561                         if( $wgDebugRedirects ) {
 562                                 $url = htmlspecialchars( $this->mRedirect );
 563                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 564                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 565                                 print "</body>\n</html>\n";
 566                         } else {
 567                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 568                         }
 569                         wfProfileOut( $fname );
 570                         return;
 571                 }
 572                 elseif ( $this->mStatusCode )
 573                 {
 574                         $statusMessage = array(
 575                                 100 => 'Continue',
 576                                 101 => 'Switching Protocols',
 577                                 102 => 'Processing',
 578                                 200 => 'OK',
 579                                 201 => 'Created',
 580                                 202 => 'Accepted',
 581                                 203 => 'Non-Authoritative Information',
 582                                 204 => 'No Content',
 583                                 205 => 'Reset Content',
 584                                 206 => 'Partial Content',
 585                                 207 => 'Multi-Status',
 586                                 300 => 'Multiple Choices',
 587                                 301 => 'Moved Permanently',
 588                                 302 => 'Found',
 589                                 303 => 'See Other',
 590                                 304 => 'Not Modified',
 591                                 305 => 'Use Proxy',
 592                                 307 => 'Temporary Redirect',
 593                                 400 => 'Bad Request',
 594                                 401 => 'Unauthorized',
 595                                 402 => 'Payment Required',
 596                                 403 => 'Forbidden',
 597                                 404 => 'Not Found',
 598                                 405 => 'Method Not Allowed',
 599                                 406 => 'Not Acceptable',
 600                                 407 => 'Proxy Authentication Required',
 601                                 408 => 'Request Timeout',
 602                                 409 => 'Conflict',
 603                                 410 => 'Gone',
 604                                 411 => 'Length Required',
 605                                 412 => 'Precondition Failed',
 606                                 413 => 'Request Entity Too Large',
 607                                 414 => 'Request-URI Too Large',
 608                                 415 => 'Unsupported Media Type',
 609                                 416 => 'Request Range Not Satisfiable',
 610                                 417 => 'Expectation Failed',
 611                                 422 => 'Unprocessable Entity',
 612                                 423 => 'Locked',
 613                                 424 => 'Failed Dependency',
 614                                 500 => 'Internal Server Error',
 615                                 501 => 'Not Implemented',
 616                                 502 => 'Bad Gateway',
 617                                 503 => 'Service Unavailable',
 618                                 504 => 'Gateway Timeout',
 619                                 505 => 'HTTP Version Not Supported',
 620                                 507 => 'Insufficient Storage'
 621                         );
 622
 623                         if ( $statusMessage[$this->mStatusCode] )
 624                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 625                 }
 626
 627                 # Buffer output; final headers may depend on later processing
 628                 ob_start();
 629
 630                 # Disable temporary placeholders, so that the skin produces HTML
 631                 $sk->postParseLinkColour( false );
 632
 633                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 634                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 635
 636                 if ($this->mArticleBodyOnly) {
 637                         $this->out($this->mBodytext);
 638                 } else {
 639                         wfProfileIn( 'Output-skin' );
 640                         $sk->outputPage( $this );
 641                         wfProfileOut( 'Output-skin' );
 642                 }
 643
 644                 $this->sendCacheControl();
 645                 ob_end_flush();
 646                 wfProfileOut( $fname );
 647         }
 648
 649         /**
 650          * @todo document
 651          * @param string $ins
 652          */
 653         public function out( $ins ) {
 654                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 655                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 656                         $outs = $ins;
 657                 } else {
 658                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 659                         if ( false === $outs ) { $outs = $ins; }
 660                 }
 661                 print $outs;
 662         }
 663
 664         /**
 665          * @todo document
 666          */
 667         public static function setEncodings() {
 668                 global $wgInputEncoding, $wgOutputEncoding;
 669                 global $wgUser, $wgContLang;
 670
 671                 $wgInputEncoding = strtolower( $wgInputEncoding );
 672
 673                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 674                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 675                         return;
 676                 }
 677                 $wgOutputEncoding = $wgInputEncoding;
 678         }
 679
 680         /**
 681          * Deprecated, use wfReportTime() instead.
 682          * @return string
 683          * @deprecated
 684          */
 685         public function reportTime() {
 686                 $time = wfReportTime();
 687                 return $time;
 688         }
 689
 690         /**
 691          * Produce a "user is blocked" page.
 692          *
 693          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 694          * @return nothing
 695          */
 696         function blockedPage( $return = true ) {
 697                 global $wgUser, $wgContLang, $wgTitle;
 698
 699                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 700                 $this->setRobotpolicy( 'noindex,nofollow' );
 701                 $this->setArticleRelated( false );
 702
 703                 $id = $wgUser->blockedBy();
 704                 $reason = $wgUser->blockedFor();
 705                 $ip = wfGetIP();
 706
 707                 if ( is_numeric( $id ) ) {
 708                         $name = User::whoIs( $id );
 709                 } else {
 710                         $name = $id;
 711                 }
 712                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 713
 714                 $blockid = $wgUser->mBlock->mId;
 715
 716                 $this->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name, $blockid ) );
 717
 718                 # Don't auto-return to special pages
 719                 if( $return ) {
 720                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle->getPrefixedText() : NULL;
 721                         $this->returnToMain( false, $return );
 722                 }
 723         }
 724
 725         /**
 726          * Outputs a pretty page to explain why the request exploded.
 727          *
 728          * @param string $title Message key for page title.
 729          * @param string $msg   Message key for page text.
 730          * @return nothing
 731          */
 732         public function showErrorPage( $title, $msg ) {
 733                 global $wgTitle;
 734
 735                 $this->mDebugtext .= 'Original title: ' .
 736                   $wgTitle->getPrefixedText() . "\n";
 737                 $this->setPageTitle( wfMsg( $title ) );
 738                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 739                 $this->setRobotpolicy( 'noindex,nofollow' );
 740                 $this->setArticleRelated( false );
 741                 $this->enableClientCache( false );
 742                 $this->mRedirect = '';
 743
 744                 $this->mBodytext = '';
 745                 $this->addWikiText( wfMsg( $msg ) );
 746                 $this->returnToMain( false );
 747         }
 748
 749         /** @obsolete */
 750         public function errorpage( $title, $msg ) {
 751                 throw new ErrorPageError( $title, $msg );
 752         }
 753
 754         /**
 755          * Display an error page indicating that a given version of MediaWiki is
 756          * required to use it
 757          *
 758          * @param mixed $version The version of MediaWiki needed to use the page
 759          */
 760         public function versionRequired( $version ) {
 761                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 762                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 763                 $this->setRobotpolicy( 'noindex,nofollow' );
 764                 $this->setArticleRelated( false );
 765                 $this->mBodytext = '';
 766
 767                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 768                 $this->returnToMain();
 769         }
 770
 771         /**
 772          * Display an error page noting that a given permission bit is required.
 773          *
 774          * @param string $permission key required
 775          */
 776         public function permissionRequired( $permission ) {
 777                 global $wgGroupPermissions, $wgUser;
 778
 779                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 780                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 781                 $this->setRobotpolicy( 'noindex,nofollow' );
 782                 $this->setArticleRelated( false );
 783                 $this->mBodytext = '';
 784
 785                 $groups = array();
 786                 foreach( $wgGroupPermissions as $key => $value ) {
 787                         if( isset( $value[$permission] ) && $value[$permission] == true ) {
 788                                 $groupName = User::getGroupName( $key );
 789                                 $groupPage = User::getGroupPage( $key );
 790                                 if( $groupPage ) {
 791                                         $skin =& $wgUser->getSkin();
 792                                         $groups[] = '"'.$skin->makeLinkObj( $groupPage, $groupName ).'"';
 793                                 } else {
 794                                         $groups[] = '"'.$groupName.'"';
 795                                 }
 796                         }
 797                 }
 798                 $n = count( $groups );
 799                 $groups = implode( ', ', $groups );
 800                 switch( $n ) {
 801                         case 0:
 802                         case 1:
 803                         case 2:
 804                                 $message = wfMsgHtml( "badaccess-group$n", $groups );
 805                                 break;
 806                         default:
 807                                 $message = wfMsgHtml( 'badaccess-groups', $groups );
 808                 }
 809                 $this->addHtml( $message );
 810                 $this->returnToMain( false );
 811         }
 812
 813         /**
 814          * Use permissionRequired.
 815          * @deprecated
 816          */
 817         public function sysopRequired() {
 818                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
 819         }
 820
 821         /**
 822          * Use permissionRequired.
 823          * @deprecated
 824          */
 825         public function developerRequired() {
 826                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
 827         }
 828
 829         /**
 830          * Produce the stock "please login to use the wiki" page
 831          */
 832         public function loginToUse() {
 833                 global $wgUser, $wgTitle, $wgContLang;
 834
 835                 if( $wgUser->isLoggedIn() ) {
 836                         $this->permissionRequired( 'read' );
 837                         return;
 838                 }
 839
 840                 $skin = $wgUser->getSkin();
 841
 842                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 843                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
 844                 $this->setRobotPolicy( 'noindex,nofollow' );
 845                 $this->setArticleFlag( false );
 846
 847                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
 848                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
 849                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
 850                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
 851
 852                 # Don't return to the main page if the user can't read it
 853                 # otherwise we'll end up in a pointless loop
 854                 $mainPage = Title::newMainPage();
 855                 if( $mainPage->userCanRead() )
 856                         $this->returnToMain( true, $mainPage );
 857         }
 858
 859         /** @obsolete */
 860         public function databaseError( $fname, $sql, $error, $errno ) {
 861                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
 862         }
 863
 864         /**
 865          * @todo document
 866          * @param bool  $protected Is the reason the page can't be reached because it's protected?
 867          * @param mixed $source
 868          */
 869         public function readOnlyPage( $source = null, $protected = false ) {
 870                 global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
 871                 $skin = $wgUser->getSkin();
 872
 873                 $this->setRobotpolicy( 'noindex,nofollow' );
 874                 $this->setArticleRelated( false );
 875
 876                 if( $protected ) {
 877                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 878                         $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
 879
 880                         # Determine if protection is due to the page being a system message
 881                         # and show an appropriate explanation
 882                         if( $wgTitle->getNamespace() == NS_MEDIAWIKI && !$wgUser->isAllowed( 'editinterface' ) ) {
 883                                 $this->addWikiText( wfMsg( 'protectedinterface' ) );
 884                         } else {
 885                                 $this->addWikiText( wfMsg( 'protectedpagetext' ) );
 886                         }
 887                 } else {
 888                         $this->setPageTitle( wfMsg( 'readonly' ) );
 889                         if ( $wgReadOnly ) {
 890                                 $reason = $wgReadOnly;
 891                         } else {
 892                                 $reason = file_get_contents( $wgReadOnlyFile );
 893                         }
 894                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 895                 }
 896
 897                 if( is_string( $source ) ) {
 898                         $this->addWikiText( wfMsg( 'viewsourcetext' ) );
 899                         if( $source === '' ) {
 900                                 global $wgTitle;
 901                                 if ( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 902                                         $source = wfMsgWeirdKey ( $wgTitle->getText() );
 903                                 } else {
 904                                         $source = '';
 905                                 }
 906                         }
 907                         $rows = $wgUser->getIntOption( 'rows' );
 908                         $cols = $wgUser->getIntOption( 'cols' );
 909
 910                         $text = "\n<textarea name='wpTextbox1' id='wpTextbox1' cols='$cols' rows='$rows' readonly='readonly'>" .
 911                                 htmlspecialchars( $source ) . "\n</textarea>";
 912                         $this->addHTML( $text );
 913                 }
 914                 $article = new Article($wgTitle);
 915                 $this->addHTML( $skin->formatTemplates($article->getUsedTemplates()) );
 916
 917                 $this->returnToMain( false );
 918         }
 919
 920         /** @obsolete */
 921         public function fatalError( $message ) {
 922                 throw new FatalError( $message );
 923         }
 924
 925         /** @obsolete */
 926         public function unexpectedValueError( $name, $val ) {
 927                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
 928         }
 929
 930         /** @obsolete */
 931         public function fileCopyError( $old, $new ) {
 932                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
 933         }
 934
 935         /** @obsolete */
 936         public function fileRenameError( $old, $new ) {
 937                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
 938         }
 939
 940         /** @obsolete */
 941         public function fileDeleteError( $name ) {
 942                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
 943         }
 944
 945         /** @obsolete */
 946         public function fileNotFoundError( $name ) {
 947                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
 948         }
 949
 950         public function showFatalError( $message ) {
 951                 $this->setPageTitle( wfMsg( "internalerror" ) );
 952                 $this->setRobotpolicy( "noindex,nofollow" );
 953                 $this->setArticleRelated( false );
 954                 $this->enableClientCache( false );
 955                 $this->mRedirect = '';
 956                 $this->mBodytext = $message;
 957         }
 958
 959         public function showUnexpectedValueError( $name, $val ) {
 960                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
 961         }
 962
 963         public function showFileCopyError( $old, $new ) {
 964                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
 965         }
 966
 967         public function showFileRenameError( $old, $new ) {
 968                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
 969         }
 970
 971         public function showFileDeleteError( $name ) {
 972                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
 973         }
 974
 975         public function showFileNotFoundError( $name ) {
 976                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
 977         }
 978
 979         /**
 980          * return from error messages or notes
 981          * @param $auto automatically redirect the user after 10 seconds
 982          * @param $returnto page title to return to. Default is Main Page.
 983          */
 984         public function returnToMain( $auto = true, $returnto = NULL ) {
 985                 global $wgUser, $wgOut, $wgRequest;
 986
 987                 if ( $returnto == NULL ) {
 988                         $returnto = $wgRequest->getText( 'returnto' );
 989                 }
 990
 991                 if ( '' === $returnto ) {
 992                         $returnto = Title::newMainPage();
 993                 }
 994
 995                 if ( is_object( $returnto ) ) {
 996                         $titleObj = $returnto;
 997                 } else {
 998                         $titleObj = Title::newFromText( $returnto );
 999                 }
1000                 if ( !is_object( $titleObj ) ) {
1001                         $titleObj = Title::newMainPage();
1002                 }
1003
1004                 $sk = $wgUser->getSkin();
1005                 $link = $sk->makeLinkObj( $titleObj, '' );
1006
1007                 $r = wfMsg( 'returnto', $link );
1008                 if ( $auto ) {
1009                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
1010                 }
1011                 $wgOut->addHTML( "\n<p>$r</p>\n" );
1012         }
1013
1014         /**
1015          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1016          * and uses the first 10 of them for META keywords
1017          *
1018          * @param ParserOutput &$parserOutput
1019          */
1020         private function addKeywords( &$parserOutput ) {
1021                 global $wgTitle;
1022                 $this->addKeyword( $wgTitle->getPrefixedText() );
1023                 $count = 1;
1024                 $links2d =& $parserOutput->getLinks();
1025                 if ( !is_array( $links2d ) ) {
1026                         return;
1027                 }
1028                 foreach ( $links2d as $dbkeys ) {
1029                         foreach( $dbkeys as $dbkey => $unused ) {
1030                                 $this->addKeyword( $dbkey );
1031                                 if ( ++$count > 10 ) {
1032                                         break 2;
1033                                 }
1034                         }
1035                 }
1036         }
1037
1038         /**
1039          * @return string The doctype, opening <html>, and head element.
1040          */
1041         public function headElement() {
1042                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1043                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1044
1045                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1046                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1047                 } else {
1048                         $ret = '';
1049                 }
1050
1051                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1052
1053                 if ( '' == $this->getHTMLTitle() ) {
1054                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1055                 }
1056
1057                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1058                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1059                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1060                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
1061
1062                 $ret .= $this->getHeadLinks();
1063                 global $wgStylePath;
1064                 if( $this->isPrintable() ) {
1065                         $media = '';
1066                 } else {
1067                         $media = "media='print'";
1068                 }
1069                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1070                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1071
1072                 $sk = $wgUser->getSkin();
1073                 $ret .= $sk->getHeadScripts();
1074                 $ret .= $this->mScripts;
1075                 $ret .= $sk->getUserStyles();
1076
1077                 if ($wgUseTrackbacks && $this->isArticleRelated())
1078                         $ret .= $wgTitle->trackbackRDF();
1079
1080                 $ret .= "</head>\n";
1081                 return $ret;
1082         }
1083
1084         /**
1085          * @return string HTML tag links to be put in the header.
1086          */
1087         public function getHeadLinks() {
1088                 global $wgRequest;
1089                 $ret = '';
1090                 foreach ( $this->mMetatags as $tag ) {
1091                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1092                                 $a = 'http-equiv';
1093                                 $tag[0] = substr( $tag[0], 5 );
1094                         } else {
1095                                 $a = 'name';
1096                         }
1097                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
1098                 }
1099
1100                 $p = $this->mRobotpolicy;
1101                 if( $p !== '' && $p != 'index,follow' ) {
1102                         // http://www.robotstxt.org/wc/meta-user.html
1103                         // Only show if it's different from the default robots policy
1104                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1105                 }
1106
1107                 if ( count( $this->mKeywords ) > 0 ) {
1108                         $strip = array(
1109                                 "/<.*?>/" => '',
1110                                 "/_/" => ' '
1111                         );
1112                         $ret .= "<meta name=\"keywords\" content=\"" .
1113                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1114                 }
1115                 foreach ( $this->mLinktags as $tag ) {
1116                         $ret .= '<link';
1117                         foreach( $tag as $attr => $val ) {
1118                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1119                         }
1120                         $ret .= " />\n";
1121                 }
1122                 if( $this->isSyndicated() ) {
1123                         # FIXME: centralize the mime-type and name information in Feed.php
1124                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
1125                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
1126                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
1127                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 1.0' href='$link' />\n";
1128                 }
1129
1130                 return $ret;
1131         }
1132
1133         /**
1134          * Turn off regular page output and return an error reponse
1135          * for when rate limiting has triggered.
1136          * @todo i18n
1137          */
1138         public function rateLimited() {
1139                 global $wgOut;
1140                 $wgOut->disable();
1141                 wfHttpError( 500, 'Internal Server Error',
1142                         'Sorry, the server has encountered an internal error. ' .
1143                         'Please wait a moment and hit "refresh" to submit the request again.' );
1144         }
1145
1146         /**
1147          * Show an "add new section" link?
1148          *
1149          * @return bool True if the parser output instructs us to add one
1150          */
1151         public function showNewSectionLink() {
1152                 return $this->mNewSectionLink;
1153         }
1154 }
1155 ?>